public static void MyLister(TarArchive ta, TarEntry te, string msg)
 {
     if (te.Size > 0)
     {
         Console.WriteLine(te.Name + " " + te.Size);
         totalsize = totalsize + 1;
     }
 }

		private void WriteObjectToTar (TarOutputStream  tar_out,
					       FileSystemObject fso,
					       EventTracker     tracker)
		{
			MemoryStream memory = null;

			TarHeader header;
			header = new TarHeader ();

			StringBuilder name_builder;
			name_builder = new StringBuilder (fso.FullName);
			name_builder.Remove (0, this.FullName.Length+1);
			header.Name = name_builder.ToString ();

			header.ModTime = fso.Timestamp;
			if (fso is DirectoryObject) {
				header.Mode = 511; // 0777
				header.TypeFlag = TarHeader.LF_DIR;
				header.Size = 0;
			} else {
				header.Mode = 438; // 0666
				header.TypeFlag = TarHeader.LF_NORMAL;
				memory = new MemoryStream ();
				((FileObject) fso).AddToStream (memory, tracker);
				header.Size = memory.Length;
			}

			TarEntry entry;
			entry = new TarEntry (header);

			tar_out.PutNextEntry (entry);
			if (memory != null) {
				tar_out.Write (memory.ToArray (), 0, (int) memory.Length);
				memory.Close ();
			}
			tar_out.CloseEntry ();

			// If this is a directory, write out the children
			if (fso is DirectoryObject)
				foreach (FileSystemObject child in fso.Children)
					WriteObjectToTar (tar_out, child, tracker);
		}

		/// <summary>
		/// Raises the ProgressMessage event
		/// </summary>
		/// <param name="entry">The <see cref="TarEntry">TarEntry</see> for this event</param>
		/// <param name="message">message for this event.  Null is no message</param>
		protected virtual void OnProgressMessageEvent(TarEntry entry, string message)
		{
		    ProgressMessageHandler handler = ProgressMessageEvent;
			if (handler != null) {
				handler(this, entry, message);
			}
		}

        private void ExtractEntry(string destDir, TarEntry entry, ICSharpCode.SharpZipLib.Tar.TarInputStream stream) {
            string name = entry.Name;
            if (Path.IsPathRooted(name))
                name = name.Substring(Path.GetPathRoot(name).Length);
            name = name.Replace('/', Path.DirectorySeparatorChar);
            name = name.Substring(name.IndexOf(Path.DirectorySeparatorChar) + 1);

            string dest = Path.Combine(destDir, name);
            if (entry.IsDirectory)
                Directory.CreateDirectory(dest);
            else {
                Directory.CreateDirectory(Path.GetDirectoryName(dest));
                using (Stream outputStream = File.Create(dest)) {
                    stream.CopyEntryContents(outputStream);
                }
            }
        }

		/// <summary>
		/// Put an entry on the output stream. This writes the entry's
		/// header and positions the output stream for writing
		/// the contents of the entry. Once this method is called, the
		/// stream is ready for calls to write() to write the entry's
		/// contents. Once the contents are written, closeEntry()
		/// <B>MUST</B> be called to ensure that all buffered data
		/// is completely written to the output stream.
		/// </summary>
		/// <param name="entry">
		/// The TarEntry to be written to the archive.
		/// </param>
		public void PutNextEntry(TarEntry entry)
		{
			if ( entry == null ) {
				throw new ArgumentNullException("entry");
			}

			if (entry.TarHeader.Name.Length >= TarHeader.NAMELEN) {
				TarHeader longHeader = new TarHeader();
				longHeader.TypeFlag = TarHeader.LF_GNU_LONGNAME;
				longHeader.Name = longHeader.Name + "././@LongLink";
				longHeader.UserId = 0;
				longHeader.GroupId = 0;
				longHeader.GroupName = "";
				longHeader.UserName = "";
				longHeader.LinkName = "";
                longHeader.Size = entry.TarHeader.Name.Length;

				longHeader.WriteHeader(blockBuffer);
				buffer.WriteBlock(blockBuffer);  // Add special long filename header block

				int nameCharIndex = 0;

				while (nameCharIndex < entry.TarHeader.Name.Length) {
					Array.Clear(blockBuffer, 0, blockBuffer.Length);
					TarHeader.GetAsciiBytes(entry.TarHeader.Name, nameCharIndex, this.blockBuffer, 0, TarBuffer.BlockSize);
					nameCharIndex += TarBuffer.BlockSize;
					buffer.WriteBlock(blockBuffer);
				}
			}
			
			entry.WriteEntryHeader(blockBuffer);
			buffer.WriteBlock(blockBuffer);
			
			currBytes = 0;
			
			currSize = entry.IsDirectory ? 0 : entry.Size;
		}

		/// <summary>
		/// Put an entry on the output stream. This writes the entry's
		/// header and positions the output stream for writing
		/// the contents of the entry. Once this method is called, the
		/// stream is ready for calls to write() to write the entry's
		/// contents. Once the contents are written, closeEntry()
		/// <B>MUST</B> be called to ensure that all buffered data
		/// is completely written to the output stream.
		/// </summary>
		/// <param name="entry">
		/// The TarEntry to be written to the archive.
		/// </param>
		public void PutNextEntry(TarEntry entry)
		{
			if (entry.TarHeader.name.Length > TarHeader.NAMELEN) 
			{
            TarHeader longHeader = new TarHeader();
            longHeader.typeFlag = TarHeader.LF_GNU_LONGNAME;
            longHeader.name.Append("././@LongLink");
            longHeader.userId = 0;
            longHeader.groupId = 0;
            longHeader.groupName.Length = 0;
            longHeader.userName.Length = 0;
            longHeader.linkName.Length = 0;

            longHeader.size = entry.TarHeader.name.Length;

            Console.WriteLine("TarOutputStream: PutNext entry Long name found size = " + longHeader.size); // DEBUG

            longHeader.WriteHeader(this.blockBuf);
            this.buffer.WriteBlock(this.blockBuf);  // Add special long filename header block

            int nameCharIndex = 0;

            while (nameCharIndex < entry.TarHeader.name.Length)
            {
         		TarHeader.GetNameBytes(entry.TarHeader.name, nameCharIndex, this.blockBuf, 0, TarBuffer.BlockSize);
               nameCharIndex += TarBuffer.BlockSize;
               this.buffer.WriteBlock(this.blockBuf);
            }
			}
			
			entry.WriteEntryHeader(this.blockBuf);
			this.buffer.WriteBlock(this.blockBuf);
			
			this.currBytes = 0;
			
			this.currSize = entry.IsDirectory ? 0 : (int)entry.Size;
		}

        /// <summary>
        /// Get the next entry in this tar archive. This will skip
        /// over any remaining data in the current entry, if there
        /// is one, and place the input stream at the header of the
        /// next entry, and read the header and instantiate a new
        /// TarEntry from the header bytes and return that entry.
        /// If there are no more entries in the archive, null will
        /// be returned to indicate that the end of the archive has
        /// been reached.
        /// </summary>
        /// <returns>
        /// The next TarEntry in the archive, or null.
        /// </returns>
        public TarEntry GetNextEntry()
        {
            if (hasHitEOF) {
                return null;
            }

            if (currentEntry != null) {
                SkipToNextEntry();
            }

            byte[] headerBuf = tarBuffer.ReadBlock();

            if (headerBuf == null) {
                hasHitEOF = true;
            } else
                hasHitEOF |= TarBuffer.IsEndOfArchiveBlock(headerBuf);

            if (hasHitEOF) {
                currentEntry = null;
            } else {
                try {
                    var header = new TarHeader();
                    header.ParseBuffer(headerBuf);
                    if (!header.IsChecksumValid) {
                        throw new TarException("Header checksum is invalid");
                    }
                    this.entryOffset = 0;
                    this.entrySize = header.Size;

                    StringBuilder longName = null;

                    if (header.TypeFlag == TarHeader.LF_GNU_LONGNAME) {

                        byte[] nameBuffer = new byte[TarBuffer.BlockSize];
                        long numToRead = this.entrySize;

                        longName = new StringBuilder();

                        while (numToRead > 0) {
                            int numRead = this.Read(nameBuffer, 0, (numToRead > nameBuffer.Length ? nameBuffer.Length : (int)numToRead));

                            if (numRead == -1) {
                                throw new InvalidHeaderException("Failed to read long name entry");
                            }

                            longName.Append(TarHeader.ParseName(nameBuffer, 0, numRead).ToString());
                            numToRead -= numRead;
                        }

                        SkipToNextEntry();
                        headerBuf = this.tarBuffer.ReadBlock();
                    } else if (header.TypeFlag == TarHeader.LF_GHDR) {  // POSIX global extended header
                                                                        // Ignore things we dont understand completely for now
                        SkipToNextEntry();
                        headerBuf = this.tarBuffer.ReadBlock();
                    } else if (header.TypeFlag == TarHeader.LF_XHDR) {  // POSIX extended header
                                                                        // Ignore things we dont understand completely for now
                        SkipToNextEntry();
                        headerBuf = this.tarBuffer.ReadBlock();
                    } else if (header.TypeFlag == TarHeader.LF_GNU_VOLHDR) {
                        // TODO: could show volume name when verbose
                        SkipToNextEntry();
                        headerBuf = this.tarBuffer.ReadBlock();
                    } else if (header.TypeFlag != TarHeader.LF_NORMAL &&
                               header.TypeFlag != TarHeader.LF_OLDNORM &&
                               header.TypeFlag != TarHeader.LF_LINK &&
                               header.TypeFlag != TarHeader.LF_SYMLINK &&
                               header.TypeFlag != TarHeader.LF_DIR) {
                        // Ignore things we dont understand completely for now
                        SkipToNextEntry();
                        headerBuf = tarBuffer.ReadBlock();
                    }

                    if (entryFactory == null) {
                        currentEntry = new TarEntry(headerBuf);
                        if (longName != null) {
                            currentEntry.Name = longName.ToString();
                        }
                    } else {
                        currentEntry = entryFactory.CreateEntry(headerBuf);
                    }

                    // Magic was checked here for 'ustar' but there are multiple valid possibilities
                    // so this is not done anymore.

                    entryOffset = 0;

//.........这里部分代码省略.........

    /// <summary>
    /// Display progress information on console
    /// </summary>
    public void ShowTarProgressMessage(TarArchive archive, TarEntry entry, string message)
    {
        if (entry.TarHeader.TypeFlag != TarHeader.LF_NORMAL && entry.TarHeader.TypeFlag != TarHeader.LF_OLDNORM) {
            Console.WriteLine("Entry type " + (char)entry.TarHeader.TypeFlag + " found!");
        }

        if (message != null)
            Console.Write(entry.Name + " " + message);
        else {
            if (this.verbose) {
                string modeString = DecodeType(entry.TarHeader.TypeFlag, entry.Name.EndsWith("/")) + DecodeMode(entry.TarHeader.Mode);
                string userString = (entry.UserName == null || entry.UserName.Length == 0) ? entry.UserId.ToString() : entry.UserName;
                string groupString = (entry.GroupName == null || entry.GroupName.Length == 0) ? entry.GroupId.ToString() : entry.GroupName;

                Console.WriteLine(string.Format("{0} {1}/{2} {3,8} {4:yyyy-MM-dd HH:mm:ss} {5}", modeString, userString, groupString, entry.Size, entry.ModTime.ToLocalTime(), entry.Name));
            } else {
                Console.WriteLine(entry.Name);
            }
        }
    }

 protected abstract void PostCreate(TarEntry entry);

            public static TarFileSystemInfo FromEntry(TarFileSystem tfs, TarEntry entry)
            {
                TarFileSystemInfo fsi;

                if (entry.IsDirectory)
                    fsi = new TarDirectoryInfo();
                else
                    fsi = new TarFileInfo();

                fsi.tfs = tfs;
                fsi.CreationTime = entry.ModTime;
                fsi.Exists = true;
                fsi.FullName = entry.Name;
                fsi.LastAccessTime = entry.ModTime;
                fsi.LastWriteTime = entry.ModTime;
                fsi.Name = entry.Name.PostLastCharacter('/');
                fsi.Extension = entry.IsDirectory ? string.Empty : fsi.Name.PostFirstCharacter('.', string.Empty);
                fsi.PostCreate(entry);

                return fsi;
            }

        /// <summary>
        /// Extract an entry from the archive. This method assumes that the
        /// tarIn stream has been properly set with a call to getNextEntry().
        /// </summary>
        /// <param name="destDir">
        /// The destination directory into which to extract.
        /// </param>
        /// <param name="entry">
        /// The TarEntry returned by tarIn.getNextEntry().
        /// </param>
        void ExtractEntry(string destDir, TarEntry entry)
        {
            if (this.verbose) {
                OnProgressMessageEvent(entry, null);
            }

            string name = entry.Name;

            if (Path.IsPathRooted(name) == true) {
                // NOTE:
                // for UNC names...  \\machine\share\zoom\beet.txt gives \zoom\beet.txt
                name = name.Substring(Path.GetPathRoot(name).Length);
            }

            name = name.Replace('/', Path.DirectorySeparatorChar);

            string destFile = Path.Combine(destDir, name);

            if (entry.IsDirectory) {
                EnsureDirectoryExists(destFile);
            } else {
                string parentDirectory = Path.GetDirectoryName(destFile);
                EnsureDirectoryExists(parentDirectory);

                bool process = true;
                FileInfo fileInfo = new FileInfo(destFile);
                if (fileInfo.Exists) {
                    if (this.keepOldFiles) {
                        OnProgressMessageEvent(entry, "Destination file already exists");
                        process = false;
                    } else if ((fileInfo.Attributes & FileAttributes.ReadOnly) != 0) {
                        OnProgressMessageEvent(entry, "Destination file already exists, and is read-only");
                        process = false;
                    }
                }

                if (process) {
                    bool asciiTrans = false;
                    // TODO file may exist and be read-only at this point!
                    Stream outputStream = File.Create(destFile);
                    if (this.asciiTranslate) {
                        asciiTrans = !IsBinary(destFile);
            // TODO  do we need this stuff below?
            // original java sourcecode :
            //						MimeType mime      = null;
            //						string contentType = null;
            //						try {
            //							contentType = FileTypeMap.getDefaultFileTypeMap().getContentType( destFile );
            //
            //							mime = new MimeType(contentType);
            //
            //							if (mime.getPrimaryType().equalsIgnoreCase( "text" )) {
            //								asciiTrans = true;
            //							} else if ( this.transTyper != null ) {
            //								if ( this.transTyper.isAsciiFile( entry.getName() ) ) {
            //									asciiTrans = true;
            //								}
            //							}
            //						} catch (MimeTypeParseException ex) {
            //						}
            //
            //						if (this.debug) {
            //							Console.Error.WriteLine(("EXTRACT TRANS? '" + asciiTrans + "'  ContentType='" + contentType + "'  PrimaryType='" + mime.getPrimaryType() + "'" );
            //						}
                    }

                    StreamWriter outw = null;
                    if (asciiTrans) {
                        outw = new StreamWriter(outputStream);
                    }

                    byte[] rdbuf = new byte[32 * 1024];

                    while (true) {
                        int numRead = this.tarIn.Read(rdbuf, 0, rdbuf.Length);

                        if (numRead <= 0) {
                            break;
                        }

                        if (asciiTrans) {
                            for (int off = 0, b = 0; b < numRead; ++b) {
                                if (rdbuf[b] == 10) {
                                    string s = Encoding.ASCII.GetString(rdbuf, off, (b - off));
                                    outw.WriteLine(s);
                                    off = b + 1;
                                }
                            }
                        } else {
                            outputStream.Write(rdbuf, 0, numRead);
//.........这里部分代码省略.........

		/// <summary>
		/// Determine if the given entry is a descendant of this entry.
		/// Descendancy is determined by the name of the descendant
		/// starting with this entry's name.
		/// </summary>
		/// <param name = "desc">
		/// Entry to be checked as a descendent of this.
		/// </param>
		/// <returns>
		/// True if entry is a descendant of this.
		/// </returns>
		public bool IsDescendent(TarEntry desc)
		{
			return desc.header.name.ToString().StartsWith(this.header.name.ToString());
		}

		/// <summary>
		/// Determine if the given entry is a descendant of this entry.
		/// Descendancy is determined by the name of the descendant
		/// starting with this entry's name.
		/// </summary>
		/// <param name = "toTest">
		/// Entry to be checked as a descendent of this.
		/// </param>
		/// <returns>
		/// True if entry is a descendant of this.
		/// </returns>
		public bool IsDescendent(TarEntry toTest)
		{
			if ( toTest == null ) {
				throw new ArgumentNullException("toTest");
			}

			return toTest.Name.StartsWith(Name);
		}

		/// <summary>
		/// Construct an entry with only a <paramref name="name">name</paramref>.
		/// This allows the programmer to construct the entry's header "by hand". 
		/// </summary>
		/// <param name="name">The name to use for the entry</param>
		/// <returns>Returns the newly created <see cref="TarEntry"/></returns>
		public static TarEntry CreateTarEntry(string name)
		{
			TarEntry entry = new TarEntry();
			TarEntry.NameTarHeader(entry.header, name);
			return entry;
		}

 /// <summary>
 /// Construct an entry for a file. File is set to file, and the
 /// header is constructed from information from the file.
 /// </summary>
 /// <param name = "fileName">The file name that the entry represents.</param>
 /// <returns>Returns the newly created <see cref="TarEntry"/></returns>
 public static TarEntry CreateEntryFromFile(string fileName)
 {
     var entry = new TarEntry();
     entry.GetFileTarHeader(entry.header, fileName);
     return entry;
 }

		/// <summary>
		/// Write an entry to the archive. This method will call the putNextEntry
		/// and then write the contents of the entry, and finally call closeEntry()
		/// for entries that are files. For directories, it will call putNextEntry(),
		/// and then, if the recurse flag is true, process each entry that is a
		/// child of the directory.
		/// </summary>
		/// <param name="sourceEntry">
		/// The TarEntry representing the entry to write to the archive.
		/// </param>
		/// <param name="recurse">
		/// If true, process the children of directory entries.
		/// </param>
		public void WriteEntry(TarEntry sourceEntry, bool recurse)
		{
			if ( sourceEntry == null ) {
				throw new ArgumentNullException("sourceEntry");
			}
			
			if ( isDisposed ) {
				throw new ObjectDisposedException("TarArchive");
			}
			
			try
			{
				if ( recurse ) {
					TarHeader.SetValueDefaults(sourceEntry.UserId, sourceEntry.UserName,
											   sourceEntry.GroupId, sourceEntry.GroupName);
				}
				WriteEntryCore(sourceEntry, recurse);
			}
			finally
			{
				if ( recurse ) {
					TarHeader.RestoreSetValues();
				}
			}
		}

		/// <summary>
		/// Clone this tar entry.
		/// </summary>
		/// <returns>Returns a clone of this entry.</returns>
		public object Clone()
		{
			TarEntry entry = new TarEntry();
			entry.file = file;
			entry.header = (TarHeader)header.Clone();
			entry.Name = Name;
			return entry;
		}

		/// <summary>
		/// Write an entry to the archive. This method will call the putNextEntry
		/// and then write the contents of the entry, and finally call closeEntry()
		/// for entries that are files. For directories, it will call putNextEntry(),
		/// and then, if the recurse flag is true, process each entry that is a
		/// child of the directory.
		/// </summary>
		/// <param name="sourceEntry">
		/// The TarEntry representing the entry to write to the archive.
		/// </param>
		/// <param name="recurse">
		/// If true, process the children of directory entries.
		/// </param>
		void WriteEntryCore(TarEntry sourceEntry, bool recurse)
		{
			string tempFileName = null;
			string entryFilename   = sourceEntry.File;
			
			TarEntry entry = (TarEntry)sourceEntry.Clone();

			if ( applyUserInfoOverrides ) {
				entry.GroupId = groupId;
				entry.GroupName = groupName;
				entry.UserId = userId;
				entry.UserName = userName;
			}
			
			OnProgressMessageEvent(entry, null);
			
			if (asciiTranslate && !entry.IsDirectory) {

				if (!IsBinary(entryFilename)) {
					tempFileName = Path.GetTempFileName();
					
					using (StreamReader inStream  = File.OpenText(entryFilename)) {
						using (Stream outStream = File.Create(tempFileName)) {
						
							while (true) {
								string line = inStream.ReadLine();
								if (line == null) {
									break;
								}
								byte[] data = Encoding.ASCII.GetBytes(line);
								outStream.Write(data, 0, data.Length);
								outStream.WriteByte((byte)'\n');
							}
							
							outStream.Flush();
						}
					}
					
					entry.Size = new FileInfo(tempFileName).Length;
					entryFilename = tempFileName;
				}
			}
			
			string newName = null;
		
			if (rootPath != null) {
				if (entry.Name.StartsWith(rootPath, StringComparison.OrdinalIgnoreCase)) {
					newName = entry.Name.Substring(rootPath.Length + 1 );
				}
			}
			
			if (pathPrefix != null) {
				newName = (newName == null) ? pathPrefix + "/" + entry.Name : pathPrefix + "/" + newName;
			}
			
			if (newName != null) {
				entry.Name = newName;
			}
			
			tarOut.PutNextEntry(entry);
			
			if (entry.IsDirectory) {
				if (recurse) {
					TarEntry[] list = entry.GetDirectoryEntries();
					for (int i = 0; i < list.Length; ++i) {
						WriteEntryCore(list[i], recurse);
					}
				}
			}
			else {
				using (Stream inputStream = File.OpenRead(entryFilename)) {
					byte[] localBuffer = new byte[32 * 1024];
					while (true) {
						int numRead = inputStream.Read(localBuffer, 0, localBuffer.Length);
						
						if (numRead <=0) {
							break;
						}
						
						tarOut.Write(localBuffer, 0, numRead);
					}
				}
				
				if ( (tempFileName != null) && (tempFileName.Length > 0) ) {
					File.Delete(tempFileName);
				}
				
//.........这里部分代码省略.........

		/// <summary>
		/// Raises the ProgressMessage event
		/// </summary>
		/// <param name="entry">TarEntry for this event</param>
		/// <param name="message">message for this event.  Null is no message</param>
		protected virtual void OnProgressMessageEvent(TarEntry entry, string message)
		{
			if (ProgressMessageEvent != null) {
				ProgressMessageEvent(this, entry, message);
			}
		}

		/// <summary>
		/// Extract an entry from the archive. This method assumes that the
		/// tarIn stream has been properly set with a call to GetNextEntry().
		/// </summary>
		/// <param name="destDir">
		/// The destination directory into which to extract.
		/// </param>
		/// <param name="entry">
		/// The TarEntry returned by tarIn.GetNextEntry().
		/// </param>
		void ExtractEntry(string destDir, TarEntry entry)
		{
			OnProgressMessageEvent(entry, null);
			
			string name = entry.Name;
			
			if (Path.IsPathRooted(name)) {
				// NOTE:
				// for UNC names...  \\machine\share\zoom\beet.txt gives \zoom\beet.txt
				name = name.Substring(Path.GetPathRoot(name).Length);
			}
			
			name = name.Replace('/', Path.DirectorySeparatorChar);
			
			string destFile = Path.Combine(destDir, name);
			
			if (entry.IsDirectory) {
				EnsureDirectoryExists(destFile);
			} else {
				string parentDirectory = Path.GetDirectoryName(destFile);
				EnsureDirectoryExists(parentDirectory);
				
				bool process = true;
				FileInfo fileInfo = new FileInfo(destFile);
				if (fileInfo.Exists) {
					if (keepOldFiles) {
						OnProgressMessageEvent(entry, "Destination file already exists");
						process = false;
					} else if ((fileInfo.Attributes & FileAttributes.ReadOnly) != 0) {
						OnProgressMessageEvent(entry, "Destination file already exists, and is read-only");
						process = false;
					}
				}
				
				if (process) {
					bool asciiTrans = false;
					
					Stream outputStream = File.Create(destFile);
					if (this.asciiTranslate) {
						asciiTrans = !IsBinary(destFile);
					}
					
					StreamWriter outw = null;
					if (asciiTrans) {
						outw = new StreamWriter(outputStream);
					}
					
					byte[] rdbuf = new byte[32 * 1024];
					
					while (true) {
						int numRead = tarIn.Read(rdbuf, 0, rdbuf.Length);
						
						if (numRead <= 0) {
							break;
						}
						
						if (asciiTrans) {
							for (int off = 0, b = 0; b < numRead; ++b) {
								if (rdbuf[b] == 10) {
									string s = Encoding.ASCII.GetString(rdbuf, off, (b - off));
									outw.WriteLine(s);
									off = b + 1;
								}
							}
						} else {
							outputStream.Write(rdbuf, 0, numRead);
						}
					}
					
					if (asciiTrans) {
						outw.Close();
					} else {
						outputStream.Close();
					}
				}
			}
		}